a number of light bulbs are to be connected to a power source in which case will they provide more brightness in series or in parallel.

Asked by pr_prashant | 4th Dec, 2010, 12:00: AM

Expert Answer:

Dear student,
The brightest bulb will have the biggest p.d. across it.  If a bulb needs a big p.d. for a given current then it must have a high resistance.  So in series high resistance bulbs are brighter because they have a bigger p.d. across them.

In parallel circuits low resistance bulbs are brighter because they have a bigger current through them for the same p.d.

Hope this helps.



Answered by  | 6th Dec, 2010, 12:34: PM

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